Like everything else, context is required.
The first thing that you'll say is that the Raptors' defense was a crime against basketball. And you're absolutely right. It's certain that Bosh's defense was impacted by how terrible the rest of his team defended. But the individual play types are kind of startling in terms of where he was good and where he was bad. The same can be said for Stoudemire. Pick and roll being the biggest alarm bell if you're a team out there still looking at Bosh as your signature big. Stoudemire, despite being known as a terrible help defender, was ranked 18th in the league overall as a pick and roll defender, one of the more complex defensive sets requiring combination and knowledge of where your teammates are.
But Stoudemire certainly struggled in ISO situations. If you put him straight up on a player, he gave up .96 points per possession, a far cry from Bosh's .65. And there were nearly twice as many instances of ISO defense versus pick-and-roll man situations.
As defense to Raptors, defense to Nash, i.e., nada, zilch, defenseless.
However, re Stoudemire's ISO deficiencies, does the ISO data specifcy position? In other words, was Stoudemire -- percentage%-wise -- isolated against smalls/bigs at the same rate and proportion Bosh was? Also, does the ISO data adjust for pace? Strength of schedule or opponent?
Or was Stoudemire, in part, "exposed" to more ISO situations because:
